384 J. P. Kimball on the Geology of Chihuahua. 
the east of the road, bordering the great jornada, viz,—the 
Sierra del Eclusero, Sierra de Encenillas, and the Sierra de las 
Mastefias, while the limestone range west has undergone no 
change of aspect. The same stratigraphical conditions prevail 
all the way to the Conchos. ‘To the east of the road is seen a 
les furthe near Carretas and in the Sierra de s 
‘The famous silver mines of Santa Eulalia are in the mu 
of the long narrow N. and S. range, of the same name which 
district of some five square miles, where on a prolongation, as 
above mentioned, of th i i 
. 
